Admin New post add_meta_box() function

When you are going to add a new post then you can see many widget like publish, discussion, author etc. those function are calling from "wp-admin\edit-form-advanced.php" and the 'add_meta_box()' this function body has define under the "wp-admin\includes\template.php" line number 2782. But the widget html is coming from "wp-admin\includes\meta-boxes.php". If you change this html in here then the change will reflect in the page.